<template>

    <div>
         <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
            </el-alert>
            <!-- 进度条 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
            </el-steps>
            <!--tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
              <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click='tabClicked'>
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat" >
                       <el-cascader v-model="addForm.goods_cat" :options="catelist" expand-trigger='hover' :props="cateProps" @change="handleChange"></el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                <!-- 渲染表单的item项 -->
                <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                    <el-checkbox-group v-model="item.attr_vals">
                        <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                    </el-checkbox-group>
                </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                    <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <quill-editor v-model="addForm. goods_introduce"></quill-editor>
                    <el-button type="primary" class="btnAdd" @click='add'>添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览 -->
        <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%" >
            <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data(){
        return{
            activeIndex : '0',
            //添加商品的表单数据对象
            addForm :{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品所属分类数组
                goods_cat:[],
                pics :[],
                goods_introduce:'',
                attrs :[]
               

            },
            addFormRules:{
                goods_name :[{required:true,message:'请输入商品名称',trigger:'blur'},
                ],
                goods_price:[{required:true,message:'请输入商品价格',trigger:'blur'},
                ],
                goods_weight:[{required:true,message:'请输入商品重量',trigger:'blur'},
                ],
                goods_number:[{required:true,message:'请输入商品数量',trigger:'blur'},
                ],
                goods_cat:[{required:true,message:'请选择商品分类',trigger:'blur'},
                ],
                
            },
            catelist : [],
            cateProps :{
                label :'cat_name',
                value :'cat_id',
                children:'children'
            },
            manyTableData:[],

            onlyTableData:[],
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            headerObj: {
                Authorization:window.sessionStorage.getItem('token')
            },
            previewPath : '',
            previewVisible :false
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
       async getCateList(){
          const{data :res} = await this.$http.get(`categories`)
          if(res.meta.status !== 200){
              return this.$message.error('获取商品分类失败')
          }
          this.catelist = res.data
          console.log(this.catelist)
        },
        handleChange(){
        console.log(this.addForm.goods_cat) 
        if(this.addForm.goods_cat.length !== 3){
            this.addForm.goods_cat =[]
        }
        },
        beforeTabLeave(activeName,oldActiveName){
            console.log('即将离开的标签页名字是' + oldActiveName)
            console.log('即将进入的标签页名字是' + activeName)
            if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3)
            { this.$message.error('请先选择商品分类！')
                return false
            }
        },
        async tabClicked(){
            if(this.activeIndex ==='1'){
                const{data :res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params: {sel:"many"}})
                if(res.meta.status !== 200){
                    return this.$message.error('获取动态参数列表失败')}
                    console.log(res.data)
                    res.data.forEach(item => {
                        item.attr_vals = item.attr_vals.length === 0 ? []:
                        item.attr_vals.split(',')
                    })
                    this.manyTableData = res.data
                }else if(this.activeIndex === '2'){
                    const {data :res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params: {sel:"only"}})
                    if(res.meta.status !== 200){
                        return this.$message.error('获取静态属性列表失败')}
                         console.log(res.data) 
                         this.onlyTableData = res.data
                    }  
                },
                handlePreview(file){
                    console.log(file)
                    this.previewPath = file.response.data.url
                    this.previewVisible = true
                },
                handleRemove(file){
                    const filePath = file.response.data.tmp_path
                    const i =
                    this.addForm.pics.findIndex(x => x.pic ===filePath)
                    this.addForm.pics.splice(i,1)
                    console.log(this.addForm)
                },
                handleSuccess(response){
                    const picInfo = {
                        pic: response.data.tmp_path
                    }
                    this.addForm.pics.push(picInfo)
                    console.log(this.addForm)
                },
                add(){
                    this.$refs.addFormRef.validate(async valid =>{
                        if(!valid) {
                            return this.$message.error('请填写必要的表单项！')
                        }
                        const form = _.cloneDeep(this.addForm)
                        form.goods_cat = form.goods_cat.join(',')
                        //处理动态参数
                        this.manyTableData.forEach(item =>{
                            const newInfo = {
                                attr_id:item.attr_id,
                                attr_value:item.attr_vals.join(' ')
                            }
                            this.addForm.attrs.push(newInfo)
                        })
                        //处理静态属性
                        this.onlyTableData.forEach(item=>{
                            const newInfo = {attr_id:item.attr_id,
                            attr_name:item.attr_vals}
                          this.addForm.attrs.push(newInfo)
                        })
                        form.attrs =this.addForm.attrs
                        console.log(form)
                        const{data :res} = await this.$http.post('goods',form)
                        
                        if(res.meta.status !== 201){
                            return this.$message.error('添加商品失败！')
                        }
                        this.$message.success('添加商品成功！')
                        this.$router.push('/goods')

                    })
                }
            },
            computed :{
                cateId(){
                    if(this.addForm.goods_cat.length ===3){
                        return this.addForm.goods_cat[2]
                    }
                    return null
                }
            } 
    }
</script>

<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px
}
</style>

